钢纤维混凝土的抗压疲劳特性研究

Research on the Behavior of Steel Fiber Reinforced Concrete Under Cyclic Compressive Loading

研究了素混凝土和钢纤维混凝土在轴压疲劳荷载下的破坏机理.通过试验研究了钢纤维品种、纤维掺量、加载应力水平对疲劳寿命及能量吸收的影响规律;探讨了疲劳累积损伤的特性.研究表明:在较低的应力水平下,钢纤维混凝土的疲劳寿命、能量吸收值均比高应力水平时明显增大.

Results of an experimental investigation of the behavior of steel fiber reinforced concrete under cyclic compressive loading are presented. The parameters of fiber type, fiber volume and the tress-strength ratio are all studied. The main emphasis is placed on the fatigue life, energy absorption and damage accumulation. Fibers up to 2 percent have considerable beneficial effect on the fatigue behavior of concrete. Fibers dissipate much more additional energy at lower stress levels than at higher stress levels.